Subsidies will be terminated if you don't prove income for 2014!!! What to do?

I'm self-employed but had no income for 2013. I estimated my income for 2014 as $11500. The eligibility results for Federal subsidies that were generated for me is asking me to provide estimated proof of income for 2014 by 4/29/14 or I will lose my subsidies. Since I'm self employed I am guessing they would need an unemployment ledger.

The problem is they don't know where to find an employment ledger. I found something that might work at https://www.state.sd.us/eforms/secure/eforms/E0990V1-SelfEmploymentLedger.pdf

Does anyone know of a better one or what to do? I seems ludicrous to ask for proof of income for a year that hasn't occurred yet.

Thank you,

Cat